Communication Systems
The disadvantage of FM over AM is that

High output power is needed
High modulating power is needed
Large bandwidth is required
Noise is very high for high frequency

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Communication Systems
Circular polarization

Involves critical alignment of transmitting and receiving antenna
Is useful in reducing depolarization effect on received wave
Is useful in discrimination between reception of adjacent beams
None of these

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Communication Systems
Assertion (A): In FM the frequency of the carrier is varied by the modulating voltageReason (R): FM and PM are two forms of angle modulation.

A is wrong but R is correct
Both A and R are correct but R is not correct explanation of A
Both A and R are correct and R is correct explanation of A
A is correct but R is wrong

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